Big merge from experimental to bleeding edge.

tests/compiler/dart2js/mock_compiler.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library mock_compiler;
 
 import 'dart:uri';
 
 import '../../../sdk/lib/_internal/compiler/compiler.dart' as api;
 import '../../../sdk/lib/_internal/compiler/implementation/dart2jslib.dart'
@@ skipping 125 matching lines @@
 
   /**
    * Used internally to create a library from a source text. The created library
    * is fixed to export its top-level declarations.
    */
   LibraryElement createLibrary(String name, String source) {
     Uri uri = new Uri.fromComponents(scheme: "source", path: name);
     var script = new Script(uri, new MockFile(source));
     var library = new LibraryElement(script);
     parseScript(source, library);
-    library.setExports(library.localScope.values);
+    library.setExports(library.localScope.values.toList());
     return library;
   }
 
   void reportWarning(Node node, var message) {
     warnings.add(new WarningMessage(node, message.message));
   }
 
   void reportError(Node node, var message) {
     if (message is String && message.startsWith("no library name found in")) {
       // TODO(ahe): Fix the MockCompiler to not have this problem.
@@ skipping 73 matching lines @@
 
   Script readScript(Uri uri, [ScriptTag node]) {
     SourceFile sourceFile = sourceFiles[uri.toString()];
     if (sourceFile == null) throw new ArgumentError(uri);
     return new Script(uri, sourceFile);
   }
 }
 
 void compareWarningKinds(String text, expectedWarnings, foundWarnings) {
   var fail = (message) => Expect.fail('$text: $message');
-  Iterator<MessageKind> expected = expectedWarnings.iterator();
-  Iterator<WarningMessage> found = foundWarnings.iterator();
+  HasNextIterator<MessageKind> expected =
+      new HasNextIterator(expectedWarnings.iterator);
+  HasNextIterator<WarningMessage> found =
+      new HasNextIterator(foundWarnings.iterator);
   while (expected.hasNext && found.hasNext) {
     Expect.equals(expected.next(), found.next().message.kind);
   }
   if (expected.hasNext) {
     do {
       print('Expected warning "${expected.next()}" did not occur');
     } while (expected.hasNext);
     fail('Too few warnings');
   }
   if (found.hasNext) {
@@ skipping 28 matching lines @@
   operator []=(Node node, Element element) {
     map[node] = element;
   }
 
   operator [](Node node) => map[node];
 
   void remove(Node node) {
     map.remove(node);
   }
 }